Studies on Synthesis of the Enzymic Polymerized Urushi Liquid that has Natural Drying Property under a Low Humidity Environment

本研究以低湿环境下具有自然干燥性能的聚合漆为目的，进行了基础实验，并对漆酶在恒温恒湿室中对漆液进行酶氧化干燥后漆膜随时间的硬化过程进行了研究。根据干燥过程中红外光谱的变化以及原料和糖木漆的抗氧化性能，我们推测漆液中侧链容易发生自氧化，这是酶促聚合的结果。测定了漆膜和液薄相的干燥性能和聚合度的进展时间的变化。在低湿度环境下自然干燥的时间内，漆酚的分子量分布被承认为单体组分下降到27%以下。生漆经过重复的“黑素”酶氧化，降低漆酚单体。同时，在该反应中，由于变化之间存在相关性，确定了羟基值和抗氧化能力降低，侧链更容易发生抗氧化反应，我们建立了关系式。

We conducted a basic experiment for the purpose of developing polymerized urushi that has a natural drying property in a low humidity environment, and examined the hardening process of the coating film with time as the urushi liquid dried by the enzymic oxidation using laccase in a constant temperature and humidity chamber. We postulated that the auto-oxidation of the side chain easily occurs in the urushi liquid due to the enzymic polymerization based on the change in the IR spectra during the drying process and anti-oxidation property of raw and sugurome urushi. And, as a result, the change in the progress time of the drying property and degree of polymerization of the urushi coating film and liquid thin phase were measured. The molecular weight distribution of the urushiol in the time that naturally dries in a low humidity environment was admitted that the monomer component decreased to 27% or less. Raw urushi undergoes enzymic oxidation by repetitive "Kurome" and decreases the urushiol monomer. Also, in this reaction, we developed a relation formula because there is a correlation in the changes, it was determined that the hydroxy value and anti-oxidization power decrease and the anti-oxidation of the side chain more easily occurs.